<template>
 <div class="top-category">
    <div class="container">
      <!-- 面包屑 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <Transition name="fade-right" mode="out-in">
          <XtxBreadItem :key="topCategory.id">{{topCategory.name}}</XtxBreadItem>
        </Transition>
      </XtxBread>
      <!-- 轮播图 -->
      <XtxCarousel :sliders="sliders" style="height:500px" />
      <!-- 所有二级分类 -->
      <div class="sub-list">
        <h3>全部分类</h3>
        <ul>
          <li v-for="sub in topCategory.children" :key="sub.id">
            <a href="javascript:;">
              <img :src="sub.picture" >
              <p>{{sub.name}}</p>
            </a>
          </li>
        </ul>
      </div>
      <!-- 不同分类商品 -->
<div class="ref-goods" v-for="sub in subList" :key="sub.id">
    <div class="head">
        <h3>- {{sub.name}} -</h3>
        <p class="tag">温暖柔软，品质之选</p>
        <XtxMore :path="`/category/sub/${sub.id}`"/>
    </div>
    <div class="body">
        <GoodsItem v-for="goods in sub.goods" :key="goods.id" :goods="goods" />
    </div>
</div>
    </div>
  </div>
</template>
<script>
import {computed, ref, watch} from 'vue'
import { findBanner } from '@/api/home'
import { useStore } from 'vuex'
import { useRoute } from 'vue-router'
import GoodsItem from './components/goods-item.vue'
import { findTopCategory } from '@/api/category'
export default {
  name: 'TopCategory',
  components:{GoodsItem},
  setup(){
    //轮播图
    const sliders=ref([])
    findBanner().then(data=>{
      sliders.value=data.result
    })
    //面包屑+所有子分类
    const store=useStore()
    const router=useRoute()
    const topCategory=computed(()=>{
      let cate={}
      //当前顶级分类===根据路由上的id去vuex中category模块的list中查找
      const item= store.state.category.list.find(item=>{
        return item.id===router.params.id
      })
      if(item) cate=item
      return cate
    })

    //获取各个子类目下的推荐商品
    const subList=ref([])
    const getsubList=()=>{
      findTopCategory(router.params.id).then(data=>{
      subList.value=data.result.children
    })
    }
    watch(()=>router.params.id,(newVal)=>{
      // newVal && getsubList()
      if(newVal && `/category/${newVal}`===router.path) getsubList()
    },{immediate:true})

    return {sliders,topCategory,subList}
  }
}
</script>
<style scoped lang="less">

.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }
  .sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
  //推荐商品
    .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;
    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }
      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }
    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
}

</style>
